Org Bubbles
Org Bubbles visualizes a 13-node organizational hierarchy as a force-directed bubble chart, using data from a CSV with ID, PID, level, and type fields. The D3 v4 code builds an SVG with circles and connecting lines, using `d3.forceSimulation` with forces for links, collision, many-body charge, and center attraction to create a dynamic, draggable layout. Interactive buttons group all bubbles together or split them by location, type, or organization, while the simulation animates the repositioning and fades link strokes.